PreferencesManager

ash/common/shelf/shelf_controller.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/shelf/shelf_controller.h"
 
 #include "ash/common/shelf/shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_menu_model.h"
 #include "ash/common/shelf/wm_shelf.h"
+#include "ash/common/shell_delegate.h"
 #include "ash/common/wm_lookup.h"
 #include "ash/common/wm_root_window_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "base/strings/utf_string_conversions.h"
+#include "services/preferences/public/cpp/pref_observer_store.h"
+#include "services/preferences/public/interfaces/preferences.mojom.h"
+#include "services/service_manager/public/cpp/connector.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/resources/grit/ui_resources.h"
 
 namespace ash {
 
 namespace {
 
@@ skipping 136 matching lines @@
 }
 
 }  // namespace
 
 ShelfController::ShelfController() {}
 
 ShelfController::~ShelfController() {}
 
 void ShelfController::BindRequest(mojom::ShelfControllerRequest request) {
   bindings_.AddBinding(this, std::move(request));
+
+  // Sample of connecting to the PreferencesManager
+  WmShell* shell = WmShell::Get();
+  service_manager::Connector* connector =
+      shell->delegate()->GetShellConnector();
+  if (!connector)
+    return;
+  prefs::mojom::PreferencesManagerPtr pref_manager_ptr;
+  connector->ConnectToInterface("service:content_browser", &pref_manager_ptr);
+  store_ = new PrefObserverStore(std::move(pref_manager_ptr));
+  std::set<std::string> keys;
+  const std::string key("hey");
+  keys.insert(key);
+  store_->Init(keys);

[jonross, 2016/11/02 19:57:30]

Once this is connected it can be used as a normal PrefStore for accessing prefs.

I'm considering modifying PrefService to perform this init behind the scenes.

On the Ash side you can implement PrefStore::Observer to be notified of changes
to prefs. The PrefObserverStore above will trigger notifications to these
observers once chrome has sent the initial values.

 }
 
 void ShelfController::NotifyShelfCreated(WmShelf* shelf) {
   // Notify observers, Chrome will set alignment and auto-hide from prefs.
   int64_t display_id = shelf->GetWindow()->GetDisplayNearestWindow().id();
   observers_.ForAllPtrs([display_id](mojom::ShelfObserver* observer) {
     observer->OnShelfCreated(display_id);
   });
 }
 
@@ skipping 94 matching lines @@
     return;
   ShelfID shelf_id = app_id_to_shelf_id_[app_id];
   int index = model_.ItemIndexByID(shelf_id);
   DCHECK_GE(index, 0);
   ShelfItem item = *model_.ItemByID(shelf_id);
   item.image = GetShelfIconFromBitmap(image);
   model_.Set(index, item);
 }
 
 }  // namespace ash